Manufacture of iron or steel wire.



PATENTED SEPT. 6, 1904.

F. FORSBERG. MANUFACTURE 0F IRON 0R STEEL WIRE.

APPLICATION FILED MAB. 25. 1903.

3 SHEETS-SHEET 2.

NO MODEL.

/N VEA/TOF? ATTORNEY atented September V6, 1904 UNTTED STATES ATENTOFFICE.

FREDRIK FORSBERG, OF SANDVlKlCN, SWEDEN.

IVIANUFACTURE OF IRON OR STEEL WIRE.

" SPECIFICATION formingpart of Letters Patent No. 769,603, datedSeptember 6, 1904.

Serial No. 149,443. (No modell) To /LZZ wil/m11, H lim/ 1jreo/1.067071.:

Be it known that I, FREDRIK Fonsnne, a subject of the King of Sweden andNorway, residing' at Sandviken, in the Kingdom of Sweden, have inventedcertain new and useful improvements in the Art of Manufacturing' Iron orSteel Vire, of which the following is a specification.

This invention relates to the art of rolling' and drawing' '1r-0norrsteel rods in order to reduce them to the form of wire having' anydesired contour in cross-section.

Heretofore, so far as known to me. iron or Steel wire has been madeeither by drawing' cold the rods primarily rolled for the purpose or bydrawing such rods cold down to a dimension found suitable by experimentand then by subjecting' same to repeated hot and cold rolling' to bring'them down to the dimensions desired or b y rolling while hot in a singlepair of rolls the previously cold-drawn wire, thus bringing it down tothe dimensions required.

rl`he present invention has for its object to reduce the ordinary rodsto the sectional dimensions required while hot, cold-drawing' beingwholly eliminated; and the invention consists, essentially, insubmitting' a heated rod of the metal-viren or steel-simultaneously toroll-drawing and rolling operations, as will be hereinafter explained.

ln order that the procedure may be the better understood, the apparatuspreferably employed for effecting' it is illustrated in theaccompanying' drawings, wherein-m Figure l is a longitudinal verticalsection of the apparatus somewhat diagrammatically represented on arelatively small scale. Figs. Q., 3, and i are views illustrating' therolls on a much larger scale. Fig'. 2 is a vertical section takensubstantially at line .r2 in Fig. B. Fig'. 3 is a plan, and Fig. 4 isavertical transverse section taken substantially at line .lf in Fig'.

Referring' primarily to Fig'. l, l designates a heating-bath, suitably alead-bath, disposed over a furnace or furnaces The rod R to be operatedon is fed forward from a reel 3 through the bath l to the rolling anddrawing' rolls seen at thel right in Fig. 1, where it passessuccessively through pairs 5, 5, 5b, and 5 of horizontally-disposed andpositively-driven rolls and through pairs 6, 6, and 6l ofvertically-disposed non-driven rolls--that is to say, these pairs ofvertically-disposed rolls, which alternate in position with the pairs ofhorizontal rolls, are rotated solely by the friction of the moving rodor wire thereon. The vertical rolls clamp frictionally on the heated rodor wire as it is carried along by the horizontal rolls, and the resultis as follows: The rolls 5 draw the heated wire from the bath, the rolls5 draw it through the vertically-disposed pair of rolls 6, disposedbetween the pairs of rolls and the rolls 5" draw the rod or wire throughthe vertically-disposed pair of rolls 6", and the pair of rolls 5 drawthe rod or wire through the pair of verticallydisposed rolls 6". lnconsequence of this alternation of positively-driven rolls and nOudrivenrolls there is a straining' of the wire or rod between each pair ofnon-driven rolls and the pair of driven rolls next ahead, and as aresult of this straining' of the rod or wire the reduction of thedimensions or size of the wire when passing' between the driven rollswill be considerably greater than if this straining' of the wire did notexistwthat is to say, if the vertically-disposed rolls were positivelydriven and not rotated merely by the wire itself.

Referring to the detailed drawings, Figs. 2, 3, and e, it will sufficeto say that the horizontal rolls are driven from a shaft 7 through gearwheels S, the rolls being' of course speeded gradually higher toward theend of the series by reason of the gradual elongation of the rod orwire. The vertically-disposed pairs of rolls are mounted, each roll ofthe pair, in a sliding' block 9, and these blocks are adjusted and setup so that the rolls clamp on the rod by suitable screws .l0 and 11, asseen in Fig'. 3.

lY am aware that a method similar to that above described has beenemployed in the art of manufacturingbrassand copper wires from in theusual manner by straightening-r011s 4e l metal in a cold static, andtherefore I do not I rolling' and roll-drawing operationssimultamanufacture of wires from heated rods of neously applied atdilferent parts of the rod. iron and steel. In this art my method is anl In Witness whereof I have hereunto signed essential improvement. myname in the presence of two subscribing l l claim this. My invention isrestricted to the i 5 Having thus described my invention, I Witnesses.

claimh The herein-described improvement in the FREDRIK FORSBERG' art offorming Wire from a rod of iron or steel, which consists 1n rst heatingsaid rod, and

Vitnesses:

ERNST SvANQvIsT,

IO then, while it is hot, subjecting it to alternate l AUG. SORENSEN.

